Trap for refrigerator cars



May 22, 1923.

P. S. DOUGHERTY TRAP FOR REFRIGERATOR CARS Filed Sept. 28, 1922 I H a /7 Y M I 1 WJHL Y INVENTOR P519021 kerfg A TTOR/VE Y 8 Patented May 22, 1923.

PAUL S. DOUGHEB'IY, OF CHICAGO, ILLINOIS.

TRAP FOR REFRIGERATOR CARS.

Application filed September 28, 1922. Serial No. 591,126.

To all whom it may concern:

Be it known that I, PAUL S. DOUGHERTY, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Traps for Refrigerator Cars, of which the following is a full, clear, and exact description.

My invention relates to improvements in trap for refrigerator, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An object of my invention is to provide a trap which is of comparatively simple construction, light in weight, and which is not liable to be broken when it is being placed in position.

A further object of my invention is to provide a trap the parts of which are made of pressed metal such as pressed steel.

A further object of my invention is to provide a device of the type described, which is relatively cheap to manufacture.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated in the accompanying drawings forming part of this application, in which Figure 1 is a plan view of the device, and

Figure 2 is a section along the line 2-2 of Figure 1.

In carrying out my invention, I provide a bowl-shaped receptacle 1 which preferably is made of pressed steel and which is provided with a laterally extending flange 2. The latter has openings 3 by means of which the receptacle may be secured to the tank or metal lined bottom 3 of a refrigerator car.

The bottom of the bowl-shaped receptacle 1 has a reduced cylindrical portion 4 arranged to receive a drain pipe 5. The latter, as will be observed, may be provided with a shoulder 6 so as to make a tight fit at the point where it passes through the reduced portion 4. The joint between the pipe and the bowl may be made water-tight in any suitable manner. The upper end of the pipe 5 terminates below the upper end of the receptacle 1 and it is provided with cu -away portions 7, the cross sectional area of these cut-away portions taken together being equal to the cross sectional area of the pipe 5.

Secured to the-pipe 5 at the upper end thereof is a hinge strap 8.' This may be secured by means of a rivet 9 as shown in the drawing the position of the rivet being preferably above the bottom of the cut-away portions 7. The hinge strap 8 is bent out wardly, upwardly, and inwardly through a slot 10 in the cap which is flattened at this point so that the part enclosed by the bentover portion of the hinge strap forms a hinge pin. It will be observed that the cap 11 normally rests on the top of the pipe 5 and is held by its hinged connection in such a position that the sides of the cap are spaced from the pipe 5.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. An opening is made in the floor 12 of the car, and the receptacle 1 with the pipe 5 is inserted therein, the flange 2 being riveted or otherwise secured to the metal lined bottom of the car. As the water drains off from the melting ice, it flows into the bowl 1 until it reaches the line YY. Any further water will pass on downwardly into the pipe, but warm air from the outside cannot pass up to the pipe, owing to the water seal.

hen it is desired to clean the pipe, all that is necessary is to swing the cap from its full line position to the dotted line position shown in Figure 2, thus giving access to the pipe.

I am aware that cast iron bowls of the shape of that shown in the drawings have been made, but one trouble with a cast iron bowl is that if the flange 2 or the floor is uneven, the casting is often broken in trying to fasten the flange to the metal bottom. lVith the pressed steel flange, there is no danger of breaking the flange in fastening it.

It will be noted that there are no lugs or shoulders either 011 the cap 11 or on the pipe 5. With the cap hinged to the pipe, its position is always maintained so that the water may pass freely between the cap and pipe while an effective water seal is maintained at all times.

It will be noted that the rivet 9 which secures the hinge strap to the pipe 5 is above the water line. If, therefore, the rivet should become loosened, it will not effect the operation of the device, because it is above the water line.

I claim:

A trap for refrigerator cars comprising a pressed metal bowl-shaped receptacle, a

drain pipe projected through the bottom of said receptacle, the upper edge of the drain pipe terminating short of the upper edge of the receptacle and having a plurality of cut 5 away portions extending downwardly therefrom, a hinge strap secured to said pipe adjacent its upper edge, and a pressed metal cap having an integral hinge portion arranged to engage with the hinge strap on said pipe, whereby said cap is held in a predetermined spaced relation from the side of the drain pipe when said cap is hinged downwardly upon the pipe.

PAUL S. DOUGHERTY. 

